Hollow fibres with coated inner cavities
The new procedure enables the production of tailor-made moulds with functional inner coatings. In contrast to previous production procedures, multiple coating of template fibres is not necessary any more. The novel procedure consists of solubilising or fluidising a first material in order to solubilise or to suspend a second material therein. The mixture is processed into template fibres which subsequently can be embedded into a third material. By selectively removing the first material, cavities are created in the third material, and within these cavities an inner coating is formed by the second material. The required quantity of the substance for the inner coating is very easy to control, therefore adjusting the thickness and the morphology of the coating is easy. The procedure is also suitable for materials in which usual coating procedures are difficult to use and the production of complex forms is permitted.
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